Preparation method of nickel-manganese zinc ferrite material with high impedance and magnetic property
A manganese-zinc ferrite, high magnetic technology, applied in the manufacture of inductors/transformers/magnets, inorganic material magnetism, electrical components, etc., can solve the problems that manganese-zinc ferrite materials cannot achieve good application effects in medium and high frequencies , to enhance the mechanical properties, expand the scope of application, and improve the oxygen content distribution
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[0025] The method for preparing a nickel-manganese zinc ferrite material with high impedance and high magnetic properties of the present invention includes the following steps:
[0026] S1, will contain Ni 2+ , Zn 2+ , Mn 2+ , Fe 2+ The metal salt of is prepared into a metal nitrate solution to obtain mixed solution A, and then the alkali solution of graphene is added to mixed solution A, ethylenediaminetetraacetic acid and titanate coupling agent are added under magnetic stirring, and ammonia water is added dropwise Adjust the pH to 4-6, heat to 80-100°C, react for 1 to 2 hours, and let stand for 3 to 5 hours; obtain the first material after suction filtration, washing and drying,
[0027] S2. After adding ferrocene magnetic powder, polyvinyl alcohol (PVA) and bisphenol A epoxy resin to the first material, the second material is obtained by ball milling;
[0028] S3. After the third material is pressed into a shape, microwave sintering is performed and cooled to obtain a manganese-z...
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[0029] Example 1
[0030] (1) According to the chemical formula NiMnZnFe 2 O 4 , The Mn(NO 3 ) 2 , Fe(NO 3 ) 3 .9H 2 O, Zn(NO 3 ) 2 .6H 2 O is formulated into a 0.2mol / L aqueous solution under strong stirring according to the chemical dose ratio to obtain a mixed solution A;
[0031] (2) Preparation of the alkaline solution of graphene. Weigh a certain amount of graphene and NaOH solution and mix them with ultrasonic vibration for 30 minutes to prepare the alkaline solution of graphene; the mass ratio of NaOH to graphene is 1:1;
[0032] (3) Add the alkali solution of graphene to mixed solution A at 25°C, add ethylenediaminetetraacetic acid and titanate coupling agent under magnetic stirring, drop ammonia water to adjust the pH to 4-6, where the mixed solution The volume ratio of A to the alkaline solution of graphene is 35:1; the gel is obtained after the sol is allowed to stand for 5 minutes. The obtained gel is placed in a drying box and dried at 200° C. for about 1.5 hours to ob...
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[0036] Example 2
[0037] (1) According to the chemical formula Ni-MnZnFe 2 O 4 , The Ni(NO 3 ) 2 , Mn(NO 3 ) 2 , Fe(NO 3 ) 3 .9H 2 O, Zn(NO 3 ) 2 .6H 2 O is formulated into a 0.2mol / L aqueous solution under strong stirring according to the chemical dose ratio to obtain a mixed solution A;
[0038] (2) Preparation of the alkaline solution of graphene. Weigh a certain amount of graphene and NaOH solution and mix them with ultrasonic vibration for 30 minutes to prepare the alkaline solution of graphene; the mass ratio of NaOH to graphene is 2:1;
[0039] (3) Add the alkali solution of graphene to mixed solution A at 25°C, add ethylenediaminetetraacetic acid and titanate coupling agent under magnetic stirring, drop ammonia water to adjust the pH to 4-6, where the mixed solution The volume ratio of A to the alkaline solution of graphene is 35:1; the gel is obtained after the sol is allowed to stand for 5 minutes. The obtained gel is placed in a drying box and dried at 200° C. for about ...
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